/Engine/Source/Runtime/Engine/Classes/Materials/MaterialFunctionInterface.h
Finds the first matching parameter by name and type
template<typename ExpressionType> bool GetNamedParameterOfType ( const FHashedMaterialParameterInfo & ParameterInfo, ExpressionType *& Parameter, [UMaterialFunctionInterface](API\Runtime\Engine\Materials\UMaterialFunctionInterface) ** OwningFunction )